Simulation of mixed gas formation for a spray-wall complex guided LPG direct injection engine
| Autor: | Juan Xu, Bo-yan Xu, Long-long Jiang, Xiang-long Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Petroleum engineering business.industry 020209 energy 02 engineering and technology Mechanics Computational fluid dynamics Combustion law.invention Vortex Physics::Fluid Dynamics 020303 mechanical engineering & transports 0203 mechanical engineering law Automotive Engineering 0202 electrical engineering electronic engineering information engineering Air–fuel ratio Ignition timing Physics::Chemical Physics Engine knocking Spark plug business NOx |
| Zdroj: | International Journal of Automotive Technology. 18:489-497 |
| ISSN: | 1976-3832 1229-9138 |
| DOI: | 10.1007/s12239-017-0048-y |
| Popis: | To obtain an ultralean air-fuel ratio and to reduce engine-out NOX and HC emissions induced by the richer mixture near the spark plug, a spray and wall complex guided combustion system has been developed by utilizing the fuel characteristics of LPG. The new combustion system configuration is optimized by using a commercial CFD code, FIRE V2013, and the reliability of the system has been experimentally demonstrated by Plane Laser-Induced Fluorescence (PLIF). The mixture formation in the new combustion system under part load (2,000 rpm) is numerically simulated. With an injection timing of 40°CA BTDC, the LPG spray which is injected from two upper holes, reaches the ignition point, and the other part of the LPG spray which is injected from the bottom hole, is directed to the ignition point through the vertical vortices at the same time. At the ignition timing of about 20°CA BTDC, the two-part mixtures have been shown to form a stable and richer stratified mixture around the ignition point, and the maximum global air-fuel ratio reaches to 60: 1. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink